High-Yield Construction Hazard Control Tables
Key Takeaways
- High-yield hazard review should connect hazards, exposures, controls, and verification evidence.
- The hierarchy of controls remains the fastest way to rank plausible answer choices.
- Construction hazard questions often test recognition of changing conditions, not static definitions.
- Tables are useful only when followed by scenario practice.
- A CHST should choose controls that are feasible, timely, and stronger than warning-only responses.
High-Yield Construction Hazard Control Tables
How To Use The Tables
A final review table should do more than list hazards. It should connect the hazard to the exposure, the preferred control, and the evidence that the control is working. The CHST exam often places candidates in field conditions where several facts are true at once: the crew is behind schedule, weather changed, the subcontractor is new, a permit exists, and a worker is exposed anyway. In that setting, the best answer is usually the one that controls the exposure now and improves the system afterward.
Core Hazard Controls
| Hazard area | Exposure concern | Stronger controls | Weak answer pattern |
|---|---|---|---|
| Falls | Unprotected edge, hole, scaffold, ladder | Guardrails, covers, PFAS, platform selection, inspection | Tell workers to be careful |
| Excavation | Cave-in, water, utilities, access | Protective system, competent person inspection, safe access, spoil setback | Enter quickly to finish |
| Electrical | Shock, arc, damaged temporary power | Deenergize, GFCI, inspect cords, lockout, qualified repair | Tape damaged cords and continue |
| Struck-by | Mobile equipment, loads, traffic | Exclusion zones, spotters, traffic control, lift plans | Rely only on backup alarms |
| Caught-in | Rotating equipment, pinch points, collapse | Guards, lockout, blocking, barricades | Remove guards for speed |
| Health exposure | Silica, noise, heat, chemicals | Substitute, wet methods, ventilation, PPE, monitoring | Give PPE without assessment |
Hierarchy Of Controls Under Pressure
Use the hierarchy as your answer filter: elimination, substitution, engineering controls, administrative controls, and PPE. Elimination and engineering controls usually outrank training-only or PPE-only choices when the question asks for the best long-term control. Administrative controls still matter, especially permits, inspections, competent person review, pre-task planning, exposure rotation, and access control, but they should not be used to excuse a missing physical control.
A common exam trap is a familiar but incomplete answer. For example, a toolbox talk may be useful after repeated ladder misuse, but if the question stem says a ladder is damaged, the immediate best action is to remove it from service. A written permit may be necessary for hot work, but it does not replace fire watch, combustibles control, extinguisher readiness, and post-work monitoring when those are needed by the situation.
Changing Conditions Table
| Condition changed | CHST concern | Best review question |
|---|---|---|
| Rain after excavation inspection | Soil stability and water accumulation | Has the competent person reinspected? |
| New subcontractor arrives | Orientation and site-specific hazards | Did workers receive current instructions? |
| Crane path changes | Swing radius, ground, power lines | Was the lift plan or exclusion zone updated? |
| Heat index rises | Heat illness prevention | Are water, rest, shade, and acclimatization addressed? |
| Work moves indoors | Ventilation and evacuation | Are fumes, noise, access, and alarms controlled? |
Documentation That Supports Control
Good documentation proves that a control was planned, communicated, inspected, and corrected. Useful records include JHAs, pre-task plans, inspection forms, permits, exposure monitoring, training records, incident reports, corrective action logs, equipment inspections, and SDS access. The exam may ask what a CHST should review after a trend appears. Choose the document that would show the source of risk and whether controls were maintained.
Final Drill
For each hazard missed in practice, write one line in this format: hazard, exposure, best control, verification. Example: silica cutting, respirable dust, wet method and ventilation with respiratory protection as needed, verify by observation and exposure data. This habit turns memorized words into field decisions.
A worker is about to use a portable ladder with a cracked side rail. What is the best CHST response?
Which control generally ranks highest in the hierarchy of controls?
Heavy rain occurs overnight at an active trench. Which question should drive the morning safety decision?